var domBatch = {};
var reads = [];
var writes = [];
var batch;


function call(fns) {
  var fn;
  while (fn = fns.shift()) fn();
}

domBatch.read = function(fn) {
  batch = batch || setBatch();
  reads.push(fn);
};

domBatch.write = function(fn) {
  batch = batch || setBatch();
  writes.push(fn);
};

function setBatch() {
  return setTimeout(function() {
    call(reads);
    call(writes);
    batch = null;
  }, 0);
}